from langchain_openai import ChatOpenAI
import os
api_key=os.getenv("DASHSCOPE_API_KEY"),
chatLLM = ChatOpenAI(
    api_key=os.getenv("DASHSCOPE_API_KEY"),
    base_url="https://dashscope.aliyuncs.com/compatible-mode/v1",
    model="llama3.1-70b-instruct",  # 此处以qwen-plus为例，您可按需更换模型名称。模型列表：https://help.aliyun.com/zh/model-studio/getting-started/models
    # other params...
)
if __name__ == "__main__":
    messages = [
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "你是谁？"}]
    response = chatLLM.invoke(messages)
    print(response.model_dump_json())